>>7548128I wholly believe the code is just gibberish meant to be a hint for the hex code violet, which hints at the order of words you'll need to pick out from the violet-colored text in the MV.
What I'm stuck at though is since this entire song was detailed in Japanese (due to LUMINA being awkward with English) I'm thinking that the English lyrics are actually not meant to be used for the cipher. Coupled with how initial reactions from JP Takos being "this sounds great, but why does the JP sound weird at certain parts?" I'm thinking it's meant for Violet JP text, not Violet EN text.
The second reason for this is every combination of text I tried (putting the segments of dates in order and moving lyrics around appropriately, changing the order of 584578 [the hexcode for Violet] into 558748, which is the complementary color for Violet and the order of words it appears in on the images of the song, changing it to 584576 as many believe "ei" to be a similar word to "and", which shouldn't be included, etc.) the clearest message I could extract was "On the pleasant walk I longingly return the waning clock forming the light sky and with a forgotten smile" using the official lyrics from the MV.
Of which I also have no clue what it means so I just assume it's gibberish.